Art-n-Fly Electric Eraser, Battery Operated Eraser for Graphite pencil and Charcoal Great for high precision targeted erasing. Perfect for sketch artists, illustrators, architects The Art-n-Fly battery operated model will thoroughly erase the darkest graphite with ease, but you can also use it for pencil and charcoal edge cleanup in your sketching and drawing, for creating crisp, erased edges within tight areas and for pulling out small detail highlights in a graphite drawings. Erases mistakes easily with a rotating action Uses soft white eraser that erases well and does not tear up paper One-button Operation - Simple push of the button and a light touch are all that's required to remove marks. Works well for people with limited hand or arm mobility Requires two AAA size batteries (not included)